In the Figure,if Q = 30 $\mu$ C,q = 50 $\mu$ C,and D = 30 Cm,what Is the Magnitude of the \mu

In the figure,if Q = 30 $\mu$ C,q = 5.0 $\mu$ C,and d = 30 cm,what is the magnitude of the electrostatic force on q?

A) 15 N
B) 23 N
C) zero
D) 7.5 N
E) 38 N